YM348
目录号 : GC31503
YM348是一种口服有效的5-HT2C受体激动剂，对克隆的人类5-HT2C受体具有高亲和力，Ki为0.89nM。
Cas No.:372163-84-3
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
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- Purity: >98.00%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Kinase experiment: | Experiments are performed with membranes obtained from Chinese Hamster Ovary (CHO) cells expressing human 5-HT2C or 5-HT2A receptors and Human Embryonic Kidney 293-Epstein-Barr virus nuclear antigen (HEK293-EBNA) cells expressing human 5-HT2B receptors. Binding assays with [3H] 5-HT are carried out. The reaction medium (50 mM Tris-HCl buffer (pH 7.4) containing 4 mM CaCl2, 10 M pargyline and 0.1 mg/ml L-(+)-ascorbic acid) containing [3H] 5-HT, membrane preparation and test compounds are incubated at 37°C for 30 min. Nonspecific binding is determined in the presence of 10 M 5-HT, and specific binding is calculated as the total binding minus the nonspecific binding. After incubation, 4 mL of 50 mM Tris-HCl buffer (pH 7.4) containing 4 mM CaCl2 is added, and the medium is filtrated under decompression through a Whatman GF/B glass filter pretreated with 0.1% polyethyleneimine. The filter is washed with the same buffer solution (4 mL×3). The glass filter is immersed in 6 mL of liquid scintillator (Packard, Aquasol-2), and the radioactivity is measured with a liquid scintillation counter. The amount of protein is measured. The dissociation constants (Kd values) are obtained by Scatchard analysis using SAS (ver. 6.11). The concentrations of compounds showing 50% inhibition of receptor binding, IC50 values, are obtained by nonlinear analysis using SAS (ver. 6.11). The Ki values indicating affinity for receptors are calculated[1]. |
Animal experiment: | Rats[1]Male Wistar rats (215-350 g) are used. Rats are administered YM348 (0.0677, 0.203, 0.677, and 2.03 mg/kg) orally and moved again to their home cages. After 20 min, thereafter, the rats are individually placed in transparent acrylic plastic cages (35×30×18 cm), and their motor activity is measured for 40 min. The measurements are carried out using a SUPER-MEX sensor. SB242084 (0.1-3 mg/kg i.p.) is administered 30 min before YM348 treatment. |
References: [1]. Kimura Y, et al. Pharmacological profile of YM348, a novel, potent and orally active 5-HT2C receptor agonist. Eur J Pharmacol. 2004 Jan 1;483(1):37-43. | |
YM348 is a potent and orally active 5-HT2C receptor agonist, which shows a high affinity for cloned human 5-HT2C receptor (Ki: 0.89 nM).
YM348 has high affinity for cloned human 5-HT2C receptors with a Ki value of 0.89 nM and lower affinities for human-cloned 5-HT2B (Ki: 2.5 nM) and 5-HT2A receptors (Ki: 13 nM). To assess the binding specificity of YM348, a broad evaluation of an additional 46 binding sites including several other 5-HT receptor subtypes (1A, 1B, 1D, 3, 4, 5A, 6, 7) is performed. IC50 values of YM348 are found to be >1 μM for all of the binding sites except for the human 5-HT1A receptors (Ki: 130 nM), bovine 5-HT1D receptors (Ki: 481 nM), human 5-HT7 receptors (Ki: 177 nM), and human α2A receptors (Ki: 126 nM).YM348 exhibits a full-agonistic activity on human 5-HT2A and 5-HT2B receptors. The EC50 values of YM348 for 5-HT2C, 5-HT2A, and 5-HT2B receptors are 1.0, 93 and 3.2 nM, respectively[1].
Oral administration of YM348 induces penile erections and hypolocomotion in rats, being completely inhibited by a selective 5-HT2C receptor antagonist, SB242084. YM348 inhibits spontaneous activity in a dose-dependent manner with a minimum effective dose of 0.203 mg/kg[1].
[1]. Kimura Y, et al. Pharmacological profile of YM348, a novel, potent and orally active 5-HT2C receptor agonist. Eur J Pharmacol. 2004 Jan 1;483(1):37-43.
| Cas No. | 372163-84-3 | SDF | |
| Canonical SMILES | C[C@H](N)CN(N=C1)C2=C1C=CC3=C2C=C(CC)O3 | ||
| 分子式 | C14H17N3O | 分子量 | 243.3 |
| 溶解度 | Soluble in DMSO | 储存条件 | Store at -20°C |
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1 mg | 5 mg | 10 mg |
| 1 mM | 4.1102 mL | 20.5508 mL | 41.1015 mL |
| 5 mM | 0.822 mL | 4.1102 mL | 8.2203 mL |
| 10 mM | 0.411 mL | 2.0551 mL | 4.1102 mL |
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Antiobesity effect of YM348, a novel 5-HT2C receptor agonist, in Zucker rats
The purpose of the present study was to investigate the potency of (S)-2-(7-ethyl-1H-furo[2,3-g]indazol-1-yl)-1-methylethylamine (YM348), a 5-HT2C receptor agonist, as an antiobesity agent in Zucker rats. Single oral administration of YM348 at 0.1, 0.3, 1 and 3 mg/kg significantly reduced food intake in a dose-dependent manner. This effect of YM348 on food intake was inhibited by SB242084, a selective 5-HT2C receptor antagonist. In addition, single administration of YM348 significantly increased body temperature and calorie expenditure at doses of 0.3, 1 and 3 mg/kg, and 1 and 3 mg/kg p.o., respectively. The increasing effect of YM348 on body temperature and calorie expenditure was inhibited by SB242084. Chronic subcutaneous infusion of YM348 (3 and 30 mg/kg/day) for 2 weeks also decreased food intake. However, this hypophagic effect of YM348 was marked during the initial week of infusion but only minor in the second. In contrast, no diminution of effect on body temperature and calorie expenditure was seen on repeated administration of YM348 (1 mg/kg p.o.). Two weeks' subcutaneous infusion of YM348 (3 and 30 mg/kg/day) resulted in a significant decrease in body weight gain throughout the experiment. These results suggest that the maintenance of thermogenesis contributed to the reduced body weight by YM348. The ability of YM348 to decrease body weight in Zucker rats suggests its strong potential for development as an antiobesity agent in humans.
Pharmacological profile of YM348, a novel, potent and orally active 5-HT2C receptor agonist
YM348, (S)-2-(7-ethyl-1H-furo[2,3-g]indazol-1-yl)-1-methylethylamine, showed a high affinity for cloned human 5-HT(2C) receptors (K(i): 0.89 nM). The functional selectivity for 5-HT(2C) receptors in the 5-HT(2) receptor family was the highest among 5-HT(2C) receptor agonists, including m-chlorophenylpiperazine (mCPP) and Ro60-0175 ((S)-2-(6-chloro-5-fluoroindol-1-yl)-1-methylethylamine). Oral administration of YM348 induced penile erections and hypolocomotion in rats, being completely inhibited by a selective 5-HT(2C) receptor antagonist, SB242084 (6-chloro-5-methyl-1-[6-(2-methylpyridin-3-yloxy) pyridin-3-yl carbamoyl] indoline). The dose-response curve for penile erections, unlike that for hypolocomotion, was an inverted U-shape in the dose range of 0.0677-2.03 mg/kg. A selective 5-HT(2A) receptor antagonist, MDL100907 (R(+)-alpha-(2,3-dimethoxyphenyl)-1-[2-(4-fluorophenylethyl)]-4-piperidine-methanol), and a selective 5-HT(2B) receptor antagonist, RS-127445 (2-amino-4-(4-fluoronaphth-1-yl)-6-isopropylpyrimidine), had no effect on the decline in penile erection frequency at 2.03 mg/kg of YM348. YM348 did not affect blood pressure at 2.03 mg/kg. In conclusion, YM348 is a novel, potent and orally active 5-HT(2C) receptor agonist, and neither the activation of 5-HT(2A) or 5-HT(2B) receptors nor a cardiovascular effect is likely to contribute to the inverted U-shape dose-response curve for penile erections.
Characterization of intracavernous pressure increase induced by Ym348, a novel 5-HT2C receptor agonist, in anesthetized rats
Purpose: We investigated the effects of the novel 5-HT2C receptor agonist YM348 [(S)-2-(7-ethyl-1H-furo[2,3-g]indazol-1-yl)-1-methylethylamine] on ICP in anesthetized rats and clarified whether behavioral changes such as hypolocomotion induced at a high dose are a cause of the inverted U-shaped PE dose-response curves in conscious rats.
Materials and methods: Male Wistar rats (Japan SLC, Shizuoka, Japan) weighing 250 to 315 gm were used. The pro-erectile effect of YM348 (2.03 to 67.7 microg/kg subcutaneously) was examined in conscious rats. ICP was also monitored after YM348 treatment (0.677 to 67.7 mug/kg subcutaneously) in anesthetized rats. Response number, latency, duration, peak pressure and area under the curve were measured. The selective 5-HT2C receptor antagonist SB242084 [(6-chloro-5-methyl-1-[6-(2-methylpyridin-3-yloxy) pyridin-3-yl carbamoyl] indoline)] (0.03 to 1 mg/kg intraperitoneally) was administered 30 minutes before YM348 treatment.
Results: YM348 induced PE and ICP increases, and was significantly inhibited by SB242084. Dose-response curves for the number of PEs and ICP increases were an inverted U shape. YM348 decreased the latency of but did not affect the quality of ICP (duration, peak pressure and area under the curve) even at the highest dose.
Conclusions: Activation of 5-HT2C receptor increased ICP and, as a result, induced PE. Since the dose-response curve for the number of ICP increases under anesthetized, behavior independent conditions still showed an inverted U shape, behavioral changes were not likely to have contributed to the inverted U-shaped dose-response curves for the number of PEs in conscious rats. Furthermore, the certain magnitude of ICP increases was likely to have occurred despite the stimulus intensity after the level of 5-HT2C receptor activation crossed the threshold.
Systemic administration of 5-HT(2C) receptor agonists attenuates muscular hyperalgesia in reserpine-induced myalgia model
Fibromyalgia is a prevalent musculoskeletal disorder characterized by chronic widespread pain that significantly reduces quality of life in patients. Due to the lack of consistently effective treatment, the development of improved therapies for treating fibromyalgia is necessary. As dysfunction of serotonergic analgesic control appears to be involved in the pathophysiology of fibromyalgia, the present study explored the potential of 5-HT(2C) receptor agonists as novel therapies for treating this disease. Three 5-HT(2C) receptor agonists (lorcaserin, vabicaserin and YM348) that have been suggested to be useful in the treatment of several central nervous system diseases, including obesity and schizophrenia, were used. The effect of systemic administration of these agents on the muscular hyperalgesia that develops in the reserpine-induced myalgia (RIM) rat, a putative animal model of fibromyalgia, was investigated. RIM rats exhibited decreased muscle pressure thresholds. Microdialysis experiments showed that the concentration of serotonin (5-HT) in the spinal cord of RIM rats was significantly lower than that of controls. Lorcaserin (0.3-3 mg/kg p.o.), vabicaserin (0.3-3 mg/kg s.c.) and YM348 (0.03-0.3 mg/kg p.o.) recovered the muscle pressure threshold. The effect of lorcaserin was reversed by the pretreatment with SB242084, a 5-HT(2C) receptor antagonist. Our findings demonstrate that 5-HT(2C) receptors play a critical role in muscular hyperalgesia in RIM rats and suggest that 5-HT(2C) receptor agonists have therapeutic potential for treating chronic pain in patients with fibromyalgia although clinical extrapolation remains to be a future challenge.
Thermogenic effect of YM348, a novel 5-HT2C-receptor agonist, in rats
We have investigated the effect of S-2-(7-ethyl-1H-furo[2,3-g]indazol-1-yl)-1-methylethylamine (YM348), a novel 5-HT(2C)-receptor agonist, on body temperature and energy expenditure in Wistar rats. m-Chlorophenylpiperazine (mCPP) and S-2-(6-chloro-5-fluoroindol-1-yl)-1-methylethylamine (RO 60-0175) were used as reference 5-HT(2C)-receptor agonists. Administration of YM348, mCPP and RO 60-0175 dose-dependently and significantly increased body temperature in rats. YM348- or RO 60-0175-induced hyperthermia was significantly attenuated by the non-selective 5-HT(2)-receptor antagonist methysergide and the selective 5-HT(2C)-receptor antagonist SB242084, but not by the selective 5-HT(2A)-receptor antagonist MDL100907. mCPP-induced hyperthermia was significantly attenuated by methysergide, SB242084 and MDL100907. In addition to the increase in body temperature, YM348, mCPP and RO 60-0175 produced dose-related and significant increases in energy expenditure. YM348-, mCPP- and RO 60-0175-induced increases in energy expenditure were significantly attenuated by methysergide and SB242084 but not by MDL100907. These results suggested that 5-HT(2C)-receptor stimulation increased body temperature and energy expenditure and that the 5-HT(2C)-receptor was the target receptor in the thermogenic effect of YM348 in Wistar rats.